Answer:
5L
Step-by-step explanation:
Concentration is calculated by dividing the mass of solute(sugar) with the volume of solvent(water). In this case, you want to dilute the solution from 40% to 30%. You just add more solvent/water so the solute/sugar weight will be the same.sugar weight= volume * concentration
sugar weight1 = sugar weight2
volume1 * concentration1 = volume2 * concentration2
15 L* 40%= 30% * concentration2
concentration2= 6L / 30%
concentration2= 20L
You need to add water and change the volume of the solution from 15L into 20L. The amount of water you need to add will be: 20L-15L= 5L
Answer:
i think he would have to add 5 liters of water!
Step-by-step explanation:
